You can probably find something cool at a thrift shop. Most of my hats that I didn't personally make I bought secondhand. I have two awesome vintage Stetson tweed hats, a couple of those dinky little 1950s beanies with flowers and veils, and an awesome 1940s ladies' velour Homburg with colored feathers in the hatband. The most I ever paid for a hat was $20 for that 1940s hat. Since hardly anyone ever wears hats anymore, they tend to be very affordable at thrift and vintage shops.